Different Metrics of Pupil Diameter.

<p>We investigated several pupil diameter derived metrics to try to find the feature that obtains better classification accuracy. The average value for the statistics for all participants in the user study for both experimental conditions was calculated. The middle point between the previous two values was used as a threshold for classification. The classification accuracy is shown in the rightest column with the standard deviation. In the last row, FBA stands for mean Frequency Band Amplitude.